US4393809A - Apparatus for manufacturing magnet wire - Google Patents

Apparatus for manufacturing magnet wire Download PDF

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Publication number
US4393809A
US4393809A US05/931,314 US93131478A US4393809A US 4393809 A US4393809 A US 4393809A US 93131478 A US93131478 A US 93131478A US 4393809 A US4393809 A US 4393809A
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United States
Prior art keywords
filament
die
pay
throat portion
take
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/931,314
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English (en)
Inventor
George D. Hilker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Phelps Dodge Industries Inc
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Phelps Dodge Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Phelps Dodge Industries Inc filed Critical Phelps Dodge Industries Inc
Priority to US05/931,314 priority Critical patent/US4393809A/en
Priority to DE7979301603T priority patent/DE2967084D1/de
Priority to AT79301603T priority patent/ATE8310T1/de
Priority to EP79301603A priority patent/EP0009312B1/de
Priority to US06/255,473 priority patent/US4394417A/en
Priority to US06/255,874 priority patent/US4391848A/en
Application granted granted Critical
Publication of US4393809A publication Critical patent/US4393809A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/16—Insulating conductors or cables by passing through or dipping in a liquid bath; by spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/021—Apparatus for spreading or distributing liquids or other fluent materials already applied to the surface of an elongated body, e.g. a wire, a tube
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/065—Insulating conductors with lacquers or enamels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1042—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material provided with means for heating or cooling the liquid or other fluent material in the supplying means upstream of the applying apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/18—Wire and cord die

Definitions

  • the invention relates to magnet wire and a method and apparatus for manufacturing magnet wire, and more particularly, to a method and apparatus for applying a coating of flowable resin material on a continuously moving filament to a desired thickness in a single pass, and a magnet wire made thereby.
  • Magnet wire has been conventionally manufactured by passing a bare copper or aluminum conductor or a previously insulated copper or aluminum conductor through a bath of liquid enamel (a solution of resin material in a solvent thereof) and through an oven for driving off the solvent from the enamel and/or curing the resin, leaving a resin coat on the conductor.
  • a bath of liquid enamel a solution of resin material in a solvent thereof
  • the application of a layer of material to a filament from solution usually requires several successive coats in order to result in a concentric coat of a desired thickness. For example, six coats may be required for a 3 mil coating, although in specific applications as many as 24 coats have been required. Also, multiple coats of certain materials, such as Dacron, cannot be applied successfully from solution due to a lack of good adhesion between coats.
  • a conventional extrusion apparatus is not without problems.
  • Conventional extruders include a centering die, a material reservoir and a sizing die.
  • the centering die mechanically centers the filament in the sizing die, the sizing die determines the exterior dimensions of the coated filament and the thickness of the coat applied to the filament.
  • the primary problem associated with extrusion apparatus is the wear on the centering die.
  • centering die used to center the filament within the sizing die, the centering die must be finely adjusted to achieve a concentric coating and must be replaced periodically due to the wear resulting from the contact between the filament and the die. Centering dies tend to be expensive even when made of hardened steel; but because of the wear that occurs, diamond centering dies have been considered, but not widely used.
  • FIG. 1 is a perspective, fragmentary and diagrammatical view of the apparatus of the invention
  • FIG. 2 is a cross-sectional view of the coating die of the invention, taken substantially along the Section Line 2--2 of FIG. 1;
  • FIG. 3 is a front plan view of the coating die of the invention taken substantially along the Section line 3--3 of FIG. 1;
  • FIG. 4 is a cross-sectional view of the coating die of the invention taken substantially along the Section line 4--4 of FIG. 2.
  • the apparatus 10 generally consists of a filament pay-out device 12, a filament heater 14, a coating material dispenser 16, a coating die 18, a hardener 20, and a filament take-up device 22.
  • the filament 24 is broken at 26, at 28, and at 30.
  • the filament heater 14 in a specific embodiment in which magnet wire is being manufactured by the apparatus of the invention may include an annealer whereby the effects of drawing the wire or stretching the wire may be eliminated.
  • additional coating dies 18 and hardeners 20 may be inserted at 28 such that successive coats of different coating materials may be applied to the filament in a continuous manner.
  • Filament is used herein for all strand materials. Filaments thus include both copper and aluminum conductors and insulated copper and aluminum conductors which prior to the application of a coat of material by the apparatus and method of the invention have been insulated with a base coat of insulating material, or other conventional insulating materials, and other strand materials desirably coated. While the specific embodiments herein described primarily relate to the manufacture of magnet wire, the apparatus of the invention is thought to have utility in coating all sorts of filaments other than conductors or insulated conductors in the production of magnet wire.
  • flowable material is used herein for the general class of coating materials applied by the method and apparatus of the invention. Again, while the specific embodiments herein described refer to meltable coating materials which can be hardened by cooling the material to ambient temperatures, other flowable coating materials are contemplated as being within the general class of materials which can be applied by the method and apparatus of the invention. These materials include materials which are initially flowable but later hardened by curing or thermosetting the material and also coating materials which may include a small portion of solvent to render them flowable and later hardenable by driving the solvent from the material. In the manufacture of magnet wire, several different materials can be applied by the method and apparatus of the invention. These include polyamides such as Nylon, polyethylene terephthalates such as Dacron, polyethylenes, polycarbonates, polysulphones, epoxys, and polyesters.
  • the filament pay-out device 12 includes a spool 32 on which the filament 24 desirably coated is stored.
  • the spool 32 is mounted on spindle 34 of the pay-out device 12 so as to freely rotate in the direction of the arrow 36.
  • a brake 38 which restrains the rotation of the spool 32 as the filament 24 is being pulled therefrom by the take-up device 22 so as to prevent entanglements.
  • the pay-out device 12 can be completely eliminated, since the remaining apparatus can be used to coat conductors continuously in a single pass as the conductor is supplied from such rolling and drawing apparatus.
  • the reels 32 in this instance can be the reels upon which bare copper and aluminum conductors are now transported from the rolling and drawing operations to the magnet wire manufacturing plants.
  • an annealer 26 is an essential part of the apparatus in order to eliminate the effects of working the conductor during the rolling and drawing operations.
  • Filament heater 14 is an essential part of the apparatus of the invention to be used in the performance of the method of the invention.
  • a filament heater may be used solely to raise the temperature of the filament prior to the application of the coating material or may be a secondary annealer to further reduce the effects of the aforementioned rolling and drawing process, if required.
  • the filament heater 14 may consist of an annealer, or may consist of a filament heater.
  • the filament heater comprises a resistance coil 40 being generally tubular in shape and having opposite open ends 42 and 44.
  • the filament or conductor 24 is trained between the pay-out device 12 and the take-up device 22 through the coil 40.
  • the filament heater 14 is also provided with a control 46 by which the temperature of the conductor 24 can be controlled.
  • the filament heater 14 may also include a filament temperature measuring device such as a radiation pyrometer.
  • a filament temperature measuring device such as a radiation pyrometer.
  • the conductor temperatures reported herein are measured by such a device.
  • the flowable material applicator 16 has a chute 48 by which the material is supplied to the applicator, a material reservoir 50 in which the material may be stored, and a positive displacement pump 52 which dispenses the flowable material through a nozzle 54 directed onto the filament or conductor 24.
  • reservoir 50 is provided with a heater and a control device 56 by which the temperature of the material in the reservoir can be controlled.
  • An additional control device 58 is associated with the positive displacement pump 52 to control the amount of flowable material deposited upon the filament or conductor 24.
  • the fluid material applicator 16 may be an extrusion apparatus having the features above described.
  • both the coating material and the solvent may be fed into the applicator via the chute 48 and the reservoir 50 may be provided with a mixing apparatus having associated therewith a separate control 60.
  • the coating die 18 is illustrated in FIGS. 1 through 4.
  • the coating die 18 includes a die 62 mounted in a die box 64.
  • Die box 64 has a lip 66 against which the die 62 is held by the filament 24 passing therethrough.
  • Die box 64 is provided with heater bores 68 in which heaters 70 are positioned.
  • heaters 70 may be tubular Calrod heaters.
  • both the die block 64 and the die 62 is provided with a thermocouple bore 72 therein in which a thermocouple 74 (shown only in FIG. 4) may be positioned.
  • the temperatures are reported with regard to specific examples which are measured by the thermocouple 74.
  • the heaters 70 are connected by suitable conductors to a heater 76.
  • Heater 76 is provided with a control 78 whereby the temperature of the die 62 can be elevated above ambient temperature and controlled as desired.
  • the die 62 is shown in cross-section to include an entrance opening 80, a throat 82 and a converging interior wall 84 which interconnects the throat 82 and the entrance opening 80 of the die.
  • Interior wall 84 defines a die cavity 85 in which a portion of the coating material collects, as will be mentioned hereinafter.
  • the die also has an exit opening 86 and a diverging wall 88 interconnecting the throat 82 and the exit opening 86.
  • the converging wall 84 defines an angle A with conductor 24 of about 5 to about 40 degrees and throat 82 is tapered from converging wall 84 to diverging wall 88 so as to define an angle with the conductor 24 of about 1 to about 2 degrees.
  • the die 62 can be constructed as illustrated in a two piece fashion having a central piece 90 including the throat portion of harder and more wear resistant material than the exterior piece 92 which includes both the entrance opening 80 and the exit opening 86.
  • the hardener 20 functions to harden the coat of material on the filament or conductor 24 prior to spooling the coated filament or magnet wire by the take-up device 22.
  • the hardener 20 as illustrated includes a trough 100 having opposite open ends 102 and 104.
  • the trough is positioned such that the filament or conductor 24 can be trained to enter the open end 102, pass through the trough 100, and exit the open end 104 by the supports 106.
  • the trough 100 is sloped downwardly toward the open end 102 and provided with a source of cooling fluid, such as water 108, adjacent open end 104 and a drain 110 adjacent open end 102.
  • a water quench utilizing the structure of the hardener 20 is desired.
  • a quench is not required and thus, the cooling fluid is not used.
  • either a flow of ambient air or refrigerated air (where available) is trained on the coated conductor or filament 24.
  • each of the coating dies 18 will have a material applicator 16 associated therewith and may have a hardener 20 associated therewith.
  • the term "coating station” is used herein to refer to the assemblage of a material applicator 16, a coating die 18, and a hardener 20. In these embodiments, there will be a plurality of spaced apart coating stations between the pay-out device 12 and the take-up device 22.
  • the take-up device 22 in many respects is similar to the pay-out device 12.
  • the take-up device 22 comprises a reel 32 on which the coated filament or conductor 24 is spooled for shipment.
  • reels 32 may be the conventional spools on which coated filaments are conventionally shipped.
  • Spools 32 are mounted for rotation on a spindle 34 so as to be driven in the direction of the arrow 112.
  • a spool driver 114 Operatively connected to the spool 32 is a spool driver 114 which drives the spool 32 and thereby pulls the filament or conductor 24 from the spool or reel 32 of the pay-out device 12.
  • a continuous supply of the filament or conductor 24 is provided either by the pay-out device 12 as illustrated in FIG. 1 or from a rolling and drawing operation. If supplied from a rolling and drawing operation, the conductor 24 is always annealed to remove all effects of the rolling and drawing operation.
  • the filament or conductor 24 is then heated, if desired. Whether or not the filament 24 is heated is dependant upon the coating material utilized and the wire properties desired. Thus, the filament 24 may be heated by the heating device 14 to a temperature from about ambient temperature to about the decomposition temperature of the coating material. In most applications utilizing a melt or a heat-responsive flowable material in which the coat of material is desirably adhered to the filament or conductor 24, the filament or conductor is heated to a temperature from just below to about the melting point of the coating material. In most applications utilizing a melt or a heat-responsive flowable material in which the adhesion of the coat of material to the filament or conductor 24 is not required, the filament or conductor 24 is maintained from about the ambient temperature to slightly above the ambient temperature.
  • the coating material is then applied to the filament.
  • the coating material is stored in the reservoir 50 at a flowable temperature and is applied to the filament or conductor 24 at a flowable temperature.
  • the flowable material is applied to the conductor or filament 24 in an amount which is in excess of that required to coat the conductor to the thickness required.
  • the specific amount of the coating material applied to the filament or conductor 24 must be relatively accurately metered onto the filament 24 and the viscosity and/or the flow characteristics thereof must be carefully controlled for several reasons.
  • the filament or conductor 24 is utilized in the method of the invention to carry the flowable material into the coating die 18.
  • the viscosity and flow characteristics of the material applied to the filament or conductor 24 must be such that an amount in excess of the material required to coat the filament or conductor 24 as desired will remain on the filament or conductor 24 as it passes between the applicator 16 and the coating die 18.
  • the application of too great an excess will either result in the coated material dripping from the conductor or filament 24 between the applicator 16 and the coating die 18 or resulting in a non-concentric coating. It is for these reasons, that the applicator 16 is provided with controls 56, 58, and 60.
  • FIG. 2 shows the appropriate amount of coating material 116 in the die cavity.
  • the die cavity 85 is defined by the converging walls 84 of the die extending between the entrance opening 80 and the throat portion 82 thereof and the filament 24.
  • the coating material 116 within the die cavity 85 functions to center the filament or conductor 24 within the throat portion 82 of the die.
  • the properties of the coating material within the die cavity 85 must be controlled. In accordance with the method of the invention, such control is achieved by heating the die 18 by the heaters 70 and controlling the temperature of the die 18 by the control 78.
  • the method of the invention contemplates the application of the coating material to the filament or conductor 24 having the appropriate flow characteristics necessary to appropriately center the filament or conductor 24 within the throat portion 82 of the die 18 as above described.
  • Coating materials of various types have been successfully applied in accordance with the method of the invention by the apparatus above-described at viscosities from about 5,000 cps to about 200,000 cps.
  • the coating material 116 within the die cavity 85 appropriately centers the filament or conductor 24 within the throat portion 82 of the die 18 so long as the coating material 116 forms an annular support 120 within the die cavity 85 adjacent to the throat portion 82 and rotates in the direction of the arrows 122 inwardly or in other words from the converging wall 84 toward the conductor or filament 24.
  • the formation of the annular support 120 and the rotation thereof in the direction of the arrow 122 can be visually seen from the front of the coating die 18.
  • annular support 120 forms and rotates
  • filaments or conductors 24 are coated by the method and apparatus of the invention with a surprisingly concentric and continuous coat of coating material thereon.
  • a non-concentric and discontinuous coating is applied to the filament or conductor 24.
  • the throat portion 82 of the die 18 wipes the excess of the coating material from the filament or conductor 24 as it leaves the die cavity 85.
  • the excess of coating material supplies the coating material necessary for the formation of the annular filament support 120 above-described.
  • the size of the throat portion 82 varies in accordance with the size of the filament or conductor 24 and the desired thickness of the coat to be applied thereto.
  • the method of the invention has been successfully used with filaments ranging from about 30 AWG gauge to about 3/8" rod.
  • Conductors of rectangular cross-sections and of other cross-sections can also be coated by the method and apparatus of the invention so long as the throat portion 82 of the die 18 can be provided in geometrically similar shapes. Coatings from about 1/2 mil to about 16 mils thick can be applied by the method of the invention.
  • the throat portion 82 will have a diameter about 2 mils larger than the desired diameter of the coated filament 24 of magnet wire.
  • the coated filament or conductor 24 is then passed through the hardener 20 in order to harden the coating material thereon. While the structure of the hardener 20 and the function thereof has been described hereinabove, it should be emphasized here that the operation of the hardener 20 depends greatly upon the coating material used. Either a water quench or an air quench may be utilized. Additionally, in those flowable materials in which small amounts of solvent are used to aid in the properties of the flowable material, the hardener 20 may take the form of a filament heater 14, or a conventional curing oven (not shown). In all cases, the type of hardener 20 utilized and the temperature of the cooling liquid, air or other fluid utilized will depend both on the coating material and the speed at which the coated filament passes through the hardener 20.
  • the operation and function of the take-up device 22 was described hereinabove. However, the speed at which the take-up device 22 was driven was not mentioned.
  • the driver 114 is not limited in any way by the method of the invention.
  • the speed at which the driver 114 drives the spool 32 of the take-up device 22, in the embodiment illustrated in FIG. 1 utilizing both pay-out 12 and take-up 22 devices, is solely limited by the pay-out 12 and take-up 22 devices themselves when applying any of the coating materials mentioned herein.
  • the speed at which the take-up device 22 is driven by the driver 114 is solely limited by the take-up device 22, itself.
  • Table 1 solely relates to the production of magnet wire. Table 1 tabulates all of the essential properties of the coating material and the conductor, all of the essential process conditions, and all of the essential physical and electrical properties of the magnet wire produced in this specific example in accordance with the method of the invention utilizing the apparatus described hereinabove.
  • the magnet wire produced by the apparatus of the invention in accordance with the method of the invention meets all of the requirements of magnet wire made by other existing commercial processes.
  • Table 1 tabulates the physical and electrical properties of various magnet wires manufactured in accordance with the method of the invention utilizing the apparatus of the invention.
  • a surprising characteristic of all magnet wires made in accordance with the method of the invention utilizing the apparatus of the invention is the concentricity of the coating applied to the conductor and the continuity thereof. Both the concentricity and continuity are a surprising result when compared to magnet wires made by other existing commercial processes, without regard to the means by which the conductor or filament 24 is centered within the coating die 18 in accordance with the method of the invention.
  • Magnet wire produced by other commercial processes such as the application of coatings from solution, periodically result in non-concentric coatings and non-continuous coatings.
  • the continuity of coatings applied from solution is such that reliance upon a single coating magnet wire insulation is unheard of; and for this reason and others, multiple coatings are used as above-mentioned.
  • coatings of polyethylene, terephthalate such as Dacron have not been successfully applied in desired thicknesses from solution, since multiple coats of Dacron do not coat upon each other.
  • coatings of Dacron in a desired thickness can be applied whereby magnet wire having solely Dacron insulation can be for the first time manufactured and sold commercially.
  • magnet wire having a single coat is a commercial reality due to the concentricity and thickness of the coatings that can be applied by the apparatus and method of the invention.
  • the invention provides an improved method and apparatus for applying coatings of a flowable resin material concentrically to a moving elongated filament in a single pass, and an improved magnet wire.
  • the method and apparatus of the invention is an improvement over conventional methods of manufacturing magnet wire.
  • insulation can be applied to a continuously moving elongated conductor, concentrically, to a desired thickness in a single pass. The speed is limited only by the pay-off and take-up devices.
  • the conductor can be drawn or otherwise formed, coated, and spooled in a continuous operation which completely eliminates or substantially reduces the use of solvents, thereby eliminating the cost of solvents and the need for pollution control equipment.
  • the apparatus of the invention completely eliminates the need for highly complex machinery or dies which experience high wear and must be replaced periodically.
  • the improved method and apparatus of the invention has all of the advantages of a conventional extrusion process but none of the disadvantages.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
US05/931,314 1978-08-07 1978-08-07 Apparatus for manufacturing magnet wire Expired - Lifetime US4393809A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US05/931,314 US4393809A (en) 1978-08-07 1978-08-07 Apparatus for manufacturing magnet wire
DE7979301603T DE2967084D1 (en) 1978-08-07 1979-08-07 Method and apparatus for manufacturing magnet wire and a magnet wire made thereby
AT79301603T ATE8310T1 (de) 1978-08-07 1979-08-07 Verfahren und apparat zum herstellen von wicklungsdraht und auf diese weise hergestellter wicklungsdraht.
EP79301603A EP0009312B1 (de) 1978-08-07 1979-08-07 Verfahren und Apparat zum Herstellen von Wicklungsdraht und auf diese Weise hergestellter Wicklungsdraht
US06/255,473 US4394417A (en) 1978-08-07 1981-04-20 Magnet wire
US06/255,874 US4391848A (en) 1978-08-07 1981-04-20 Method for manufacturing magnet wire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/931,314 US4393809A (en) 1978-08-07 1978-08-07 Apparatus for manufacturing magnet wire

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US06/255,473 Continuation-In-Part US4394417A (en) 1978-08-07 1981-04-20 Magnet wire
US06/255,874 Continuation-In-Part US4391848A (en) 1978-08-07 1981-04-20 Method for manufacturing magnet wire

Publications (1)

Publication Number Publication Date
US4393809A true US4393809A (en) 1983-07-19

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Application Number Title Priority Date Filing Date
US05/931,314 Expired - Lifetime US4393809A (en) 1978-08-07 1978-08-07 Apparatus for manufacturing magnet wire

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Country Link
US (1) US4393809A (de)
EP (1) EP0009312B1 (de)
AT (1) ATE8310T1 (de)
DE (1) DE2967084D1 (de)

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US5492583A (en) * 1992-11-16 1996-02-20 Geotek, Inc. Apparatus and method for in-line coating of pultrusion profiles
US6487470B1 (en) 2000-07-18 2002-11-26 General Electric Company Method and apparatus for determining magnet wire production die sets
US20050008771A1 (en) * 2003-07-11 2005-01-13 Yoshihide Goto Device for applying varnish to electric wire and method of applying varnish
US20050118422A1 (en) * 2001-12-21 2005-06-02 Cipelli Celso L. Pulsed voltage surge resistant magnet wire
US20160319464A1 (en) * 2015-04-30 2016-11-03 Massachusetts Institute Of Technology Methods and systems for manufacturing a tablet
US9953747B2 (en) 2014-08-07 2018-04-24 Henkel Ag & Co. Kgaa Electroceramic coating of a wire for use in a bundled power transmission cable
USD860675S1 (en) 2016-12-29 2019-09-24 Conopco, Inc. Cartridge
CN112934498A (zh) * 2021-01-25 2021-06-11 金丽丽 一种线缆加工工艺专用静电喷粉装置

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DE19631298A1 (de) * 1996-08-02 1998-02-05 Lacroix & Kress Gmbh Verfahren und Vorrichtung zum Beschichten von Drähten
US6071553A (en) * 1996-08-02 2000-06-06 Alcatel Method for producing melt-bonding wires

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US3598639A (en) * 1968-12-09 1971-08-10 Bror Olov Nikolaus Hansson Method of continuously producing metal wire and profiles
US3649434A (en) * 1969-07-28 1972-03-14 Carl Walter Mortenson Encapsulating process and products of wire coated with poly(tetrafluoroethylene)
US3856566A (en) * 1972-05-24 1974-12-24 Gen Cable Corp Method of making insulated magnet wire
US3975571A (en) * 1974-10-25 1976-08-17 Sumitomo Electric Industries, Ltd. Self-bonding magnet wire
US4130676A (en) * 1977-03-14 1978-12-19 Matsushita Electric Industrial Co., Ltd. Coating apparatus and method

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US5492583A (en) * 1992-11-16 1996-02-20 Geotek, Inc. Apparatus and method for in-line coating of pultrusion profiles
US6487470B1 (en) 2000-07-18 2002-11-26 General Electric Company Method and apparatus for determining magnet wire production die sets
US20050118422A1 (en) * 2001-12-21 2005-06-02 Cipelli Celso L. Pulsed voltage surge resistant magnet wire
US7253357B2 (en) 2001-12-21 2007-08-07 Ppe Invex Produtos Padronizados E Epeciais Ltda. Pulsed voltage surge resistant magnet wire
US20050008771A1 (en) * 2003-07-11 2005-01-13 Yoshihide Goto Device for applying varnish to electric wire and method of applying varnish
US6960260B2 (en) * 2003-07-11 2005-11-01 Goto Electronic Co., Ltd. Device for applying varnish to electric wire and method of applying varnish
US9953747B2 (en) 2014-08-07 2018-04-24 Henkel Ag & Co. Kgaa Electroceramic coating of a wire for use in a bundled power transmission cable
US20160319464A1 (en) * 2015-04-30 2016-11-03 Massachusetts Institute Of Technology Methods and systems for manufacturing a tablet
US10053798B2 (en) * 2015-04-30 2018-08-21 Massachusetts Insititute Of Technology Methods and systems for manufacturing a tablet
USD860675S1 (en) 2016-12-29 2019-09-24 Conopco, Inc. Cartridge
CN112934498A (zh) * 2021-01-25 2021-06-11 金丽丽 一种线缆加工工艺专用静电喷粉装置

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DE2967084D1 (en) 1984-08-09
ATE8310T1 (de) 1984-07-15
EP0009312A1 (de) 1980-04-02
EP0009312B1 (de) 1984-07-04

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